Statistical Advisory and Assistance Services

OAS requires statistical advice and assistance including maintenance of the OIG OAS Statistical Software (RAT-STATS).   RATS-STATS is a suite of statistical modules containing a Random Number Generator, variable appraisal programs, attribute appraisal programs, and sample size estimators.  This computer application is complex and requires ad hoc editing to troubleshoot and resolve any problems which may arise.   Furthermore, the methodology used in this software is widely used by the healthcare industry as well as Federal and State oversight agencies in matters of extrapolating overpayments due to the government and extrapolating program savings.   It is necessary for RAT-STATS to function properly as it may be contested in the court system.  Included in RAT-STATS is an esoteric method of statistical sampling – RHC Multistage Sampling (RHC) – module which the Office of Audit Services often uses.  The computer programming surrounding RHC is complex.   

Contractor shall provide a variety of services in the area of statistical methodologies and generally accepted statistical principles for use in statistical sampling and statistical analysis as it relates to OAS audits.